Решим примеры, приведя дроби к общему знаменателю.
- а) $$1\frac{1}{2} - \frac{2}{3} = 1\frac{3}{6} - \frac{4}{6} = \frac{9}{6} - \frac{4}{6} = \frac{5}{6}$$
- б) $$1\frac{1}{4} - \frac{1}{3} = 1\frac{3}{12} - \frac{4}{12} = \frac{15}{12} - \frac{4}{12} = \frac{11}{12}$$
- в) $$1\frac{1}{8} - \frac{1}{4} = 1\frac{1}{8} - \frac{2}{8} = \frac{9}{8} - \frac{2}{8} = \frac{7}{8}$$
- г) $$1\frac{2}{3} - \frac{5}{6} = 1\frac{4}{6} - \frac{5}{6} = \frac{10}{6} - \frac{5}{6} = \frac{5}{6}$$
- д) $$2\frac{3}{10} - \frac{4}{15} = 2\frac{9}{30} - \frac{8}{30} = 2\frac{1}{30}$$
Ответ: а) $$\frac{5}{6}$$; б) $$\frac{11}{12}$$; в) $$\frac{7}{8}$$; г) $$\frac{5}{6}$$; д) $$2\frac{1}{30}$$